What’s Vulnerable › Vulnerabilities

CVE-2011-3486

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 49.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2011-09-16 · updated 2026-06-16
• Weakness: CWE-119

Description

Beckhoff TwinCAT 2.11.0.2004 and earlier allows remote attackers to cause a denial of service via a crafted request to UDP port 48899, which triggers an out-of-bounds read.

Affected products

• ICS-CERT Beckhoff TwinCAT: through 2.11.0.2004; 2.7, 2.8, 2.9, 2.10

References

• http://aluigi.altervista.org/adv/twincat_1-adv.txt
• http://osvdb.org/75495
• http://securityreason.com/securityalert/8380
• http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-256-06.pdf
• https://exchange.xforce.ibmcloud.com/vulnerabilities/69765
• http://aluigi.altervista.org/adv/twincat_1-adv.txt
• http://osvdb.org/75495
• http://securityreason.com/securityalert/8380
• http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-256-06.pdf
• https://exchange.xforce.ibmcloud.com/vulnerabilities/69765

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